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imgBtnClose = new QPixMap(":/wndMain/btnClose.png");

#ifndef CMAINWINDOW_H
#define CMAINWINDOW_H
#include <QMainWindow>
#include <QtGui>
class cMainWindow:public QMainWindow{
    Q_OBJECT
public:
    cMainWindow(QWidget *parent=0);
    ~cMainWindow();
private:
    virtual void resizeEvent(QResizeEvent *event);
    virtual void paintEvent(QPaintEvent *event);
    virtual void mousePressEvent(QMouseEvent *event);
    virtual void mouseReleaseEvent(QMouseEvent *event);
    virtual void mouseMoveEvent(QMouseEvent *event);
    int intWndLostNowPos [1];
    bool wndDrugOrNO;
    QPixmap *pixMainFon;
};

#endif // CMAINWINDOW_H

#include "cMainWindow.h"
#include <QBitmap>
#include <QPainter>
cMainWindow::cMainWindow(QWidget *parent):QMainWindow(parent){
    pixMainFon=new QPixmap(":/wndMain/wndMain.png");
    this->setGeometry(pixMainFon->rect());

}

cMainWindow::~cMainWindow(){

}

void cMainWindow::resizeEvent(QResizeEvent *event){
    this->setMask(pixMainFon->mask());
}

void cMainWindow::paintEvent(QPaintEvent *event){
    QRegion paintWndMainRegion(pixMainFon->rect());
    QPainter painter(this);
    painter.setClipRegion(paintWndMainRegion);
    painter.drawPixmap(pixMainFon->rect(),*pixMainFon);
}

void cMainWindow::mousePressEvent(QMouseEvent *event){
wndDrugOrNO=true;
intWndLostNowPos[0]=event->x();
intWndLostNowPos[1]=event->y();
}

void cMainWindow::mouseReleaseEvent(QMouseEvent *event){
wndDrugOrNO=false;
}

void cMainWindow::mouseMoveEvent(QMouseEvent *event){
    //**********
    if (wndDrugOrNO){
        if (event->x()>intWndLostNowPos[0]){
            this->move(this->x()+(event->x()-intWndLostNowPos[0]),this->y());
        }
        if (event->x()<intWndLostNowPos[0]){
            this->move(this->x()-(intWndLostNowPos[0]-event->x()),this->y());
        }
        if (event->y()>intWndLostNowPos[1]){
            this->move(this->x(),this->y()+(event->y()-intWndLostNowPos[1]));
        }
        if (event->y()<intWndLostNowPos[1]){
            this->move(this->x(),this->y()-(intWndLostNowPos[1]-event->y()));
        }
    }
    //**********
}

#ifndef CMAINCLOSEBUTTON_H
#define CMAINCLOSEBUTTON_H
#include <QWidget>
#include <QtGui>
class cMainCloseButton:public QWidget{
    Q_OBJECT
public:
    cMainCloseButton(QWidget *parent=0);
    ~cMainCloseButton();
private:
    virtual void resizeEvent(QResizeEvent *event);
    virtual void paintEvent(QPaintEvent *event);
    QImage *imgBtnClose;
};

#endif // CMAINCLOSEBUTTON_H

#include "cMainCloseButton.h"
#include <QPainter>
#include <QImage>
cMainCloseButton::cMainCloseButton(QWidget *parent):QWidget(parent){
   imgBtnClose = new QImage(":/wndMain/btnClose.png"); //Вот это кладет все, закомментируешь и все пучком )
}


cMainCloseButton::~cMainCloseButton(){

}

void cMainCloseButton::resizeEvent(QResizeEvent *event){
   //this->setMask(imgBtnClose.mask());
}

void cMainCloseButton::paintEvent(QPaintEvent *event){
   // QRegion btnCloseRegion(imgBtnClose.rect());
   // QPainter painter(this);
   // painter.setClipRegion(btnCloseRegion);
   // painter.drawPixmap(imgBtnClose.rect(),&imgBtnClose);
}

int intWndLostNowPos [1];
intWndLostNowPos[0]=event->x();
intWndLostNowPos[1]=event->y();